Charles b



(No Model.)

0. B. WELL. PAPER 0 G DEVICE.

No. 414,264. Patented Nov. 5, 1889.

WITNESSES:

N. mil-ls. Phdlo-ulhng w l Wuhinglm no UNITED STATES PATENT OFFICE.

CHARLES B. STIL'WELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEUNION PAPER BAG MACHINE COMPANY, OF SAME PLACE.

PAPER-CUTTING DEVICE.

SPEGIFICATION forming part of Letters Patent No. 414,264, dated November5, 1889.

Application filed July 2, 1889. Serial No. 316,328. (No model.)

To aZZ whom it may concern:

Be it known that I, CHARLES E. STIL- WELL, of the city and county ofPhiladelphia, State of Pennsylvania, have invented a new and usefulPaper-Cutting Device, of which the following is a true and exactdescription, reference being had to the accompanying drawings, whichform a part of this specilication.

My invention relates to devices for cutting paper, and is particularlyintended for use in paper-bag machinery where it is required to sever orslit a moving web of paper. In mechanism of this kind it is a usualdevice to secure a knife-blade in a revolving roll and by causing saidblade to register in turning with a slot in a table-plate or roll, overwhich the paper passes, to cut the paper at each revolution of theknife-carrying roll. In such constructions, however, the knife entersthe paper at an angle and leaves it at another, and in receding it has atendency to engage the paper and lift it up from the supportingsurface.

The object of my invention is to so combine a knife with anactuating-roll that it will enter and leave the paper at an acute angleto it in the direction in which the web is passing, thus avoiding thedefect above noted.

The novel features of my invention will be best understood after adescription of the drawings in which it is illustrated, and will behereinafter pointed out in the claim, reference being now had to thedrawings which illustrate my new device, and in which Figure l is anelevation thereof Figs. 2 and 3, cross-sectional views on the line a; a;of Fig. 1, showing my knife-blade in the positions in which it entersand leaves the paper. In Fig. 2 the knife is shown as working overaslotted table, and in Fig. 3 over a slotted roll. Fig. A is an end viewof my device.

A represents a shaftto which are attached the supporting-plates B B, inwhich are formed bearings for the bar C, which support the knife. Theseplates B are preferably made up of two concentric cylinders, as shown,united by a bar B.

D is a block attached to bar C, and to which the knife E is clamped byplate F and screws F. The end of bar 0 is, after passing through theplate B farthest from shaft A, bent at right angles, as shown at C, andit is passed through a bearing G, in which it can move longitudinallyand which is pivoted to a stationary part of the frame, as H.

I represents a roll having a slot 1', in which the knife-blade passes,severing the paper passing over the roll, and J is a table having a slotj, through which the knife passes to cut the paper passing over its top.

It is easily seen (see Figs. 2 and 3) that as the disks B revolve withshaft A the block D is carried around with the bar C, and according tothe position of the swivel-bearing G will cause the knife-blade E toenter the paper at any desired angle to it and leave it still in thesame angular direction. If the bearing G be pivoted at a point outsideof the circle described by rod C, the block D and knife E will notrevolve, but simply be pushed up and down and caused to featheraccording to the position of the pivoted bearing of the bent arm 0. If,on the other hand, the bearing G is pivoted within the circle describedby rod C, as shown in Fig. 4, then the block and knife will revolve, butthe desired feathering of the knife is still secured, as is shown inthat figure.

Having now described inyinvention,what I claim as new, and desire tosecure by Letters Patent, is-

A paper-cutter consisting of a shaft A, having bearing-plates B 13attached together at one edge, in combination with a bar C, journaled insaid plates and having an arm C turned up at right angles outside of oneof the bearing-plates, a knife attached to said bar, and a pivotedbearing for the arm C, all substantially as and for the purposespecified.

CHARLES B. STILWVELL.

Witnesses:

LEWIs B. DIoK, FRANCIS T. CHAMBERS.

